Docs: correct scalapack-gvx into scalapack_gvx (deepmodeling#3190)

* improved implementation of kerker preconditioner

* fix bug in charge_mixing_test

* make corresponding changes in Documentation after PR#3133

* extra add

* correct 'scalapack-gvx' into 'scalapack_gvx'

docs/advanced/input_files/input-main.md

@@ -868,7 +868,7 @@ calculations.
   For atomic orbitals basis,
 
   - **genelpa**: This method should be used if you choose localized orbitals.
-  - **scalapack-gvx**: Scalapack can also be used for localized orbitals.
+  - **scalapack_gvx**: Scalapack can also be used for localized orbitals.
   - **cusolver**: (Unavailable currently, it will be fixed in future versions) This method needs building with the cusolver component for lcao and at least one gpu is available.
 
   If you set ks_solver=`genelpa` for basis_type=`pw`, the program will be stopped with an error message:

source/module_hsolver/hsolver.h

@@ -59,7 +59,7 @@ class HSolver
 
     std::string classname = "none";
     // choose method of DiagH for solve Hamiltonian matrix
-    // cg, dav, elpa, scalapack-gvx, cusolver
+    // cg, dav, elpa, scalapack_gvx, cusolver
     std::string method = "none";
   public:
     Real diag_ethr=0.0; //threshold for diagonalization